{{Tip|If your tier is equivalent to another tier, then <code>Tier#getTag</code> should return an empty tag reference defined by <code>BlockTags#createOptional</code> and have the equivalent tier be placed in the <code>after</code> list when registering. If the tier is a vanilla tier, you should also specify the next tier above in the <code>before</code> list.}}
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{{Tip|If your tier is equivalent to another tier, then <code>Tier#getTag</code> should return an empty tag reference defined by <code>BlockTags#create</code> and have the equivalent tier be placed in the <code>after</code> list when registering. If the tier is a vanilla tier, you should also specify the next tier above in the <code>before</code> list.}}